cherry pick final shader

application/testing/tests.features.cmake

@@ -421,6 +421,7 @@ f3d_test(NAME TestFinalShaderNegative DATA cow.vtp ARGS --final-shader "vec4 pix
 f3d_test(NAME TestFinalShaderNegativeFileName DATA cow.vtp ARGS --filename --final-shader "vec4 pixel(vec2 uv){return vec4(vec3(1.0) - texture(source, uv).rgb, 1.0)\\\\\\\;}" UI)
 f3d_test(NAME TestFinalShaderUndefined DATA cow.vtp ARGS --final-shader "undefined" REGEXP "Final shader must define a function" NO_BASELINE)
 f3d_test(NAME TestFinalShaderCompilationFailure DATA cow.vtp ARGS --final-shader "vec4 pixel(vec2 uv){}" --verbose REGEXP " build the shader program" NO_BASELINE)
++f3d_test(NAME TestFinalShaderTimeUniform DATA cow.vtp ARGS --final-shader "vec4 pixel(vec2 uv){return vec4(texture(source, uv).rgb * (0.5 + 0.5*cos(time+uv.xyx+vec3(0,2,4))), 1.0)\\\\\\\;}")
 
 ## Command Script
 f3d_test(NAME TestCommandScriptBasic SCRIPT DATA dragon.vtu) # roll_camera 90;toggle ui.scalar_bar;print_scene_info;increase_light_intensity

library/src/interactor_impl.cxx

@@ -620,6 +620,7 @@ class interactor_impl::internals
     vtkRenderWindow* renWin = this->Window.GetRenderWindow();
     vtkF3DRenderer* ren = vtkF3DRenderer::SafeDownCast(renWin->GetRenderers()->GetFirstRenderer());
     ren->SetUIDeltaTime(deltaTime);
+    ren->SetTotalTime(ren->GetTotalTime() + deltaTime);
 
     // Determine if we need a full render or just a UI render
     // At the moment, only TAA requires a full render each frame

vtkext/private/module/vtkF3DRenderer.h

@@ -493,6 +493,12 @@ class vtkF3DRenderer : public vtkOpenGLRenderer
    */
   void SetUIDeltaTime(double time);
 
+  /**
+   * Set/Get the total animation time (cumulative time of each frame being rendered) in seconds
+   */
+  vtkSetMacro(TotalTime, double);
+  vtkGetMacro(TotalTime, double);
+
   /**
    * Set console badge enabled status
    */
@@ -632,6 +638,7 @@ class vtkF3DRenderer : public vtkOpenGLRenderer
   vtkSmartPointer<vtkCameraOrientationRepresentation> ModernAxisRepresentation;
   vtkSmartPointer<vtkCallbackCommand> ModernAxisWidgetResizeCallback;
   double ModernAxisBackdropOpacity = 0.0;
+  double TotalTime = 0.0;
 
   // Does vtk version support GridAxesActor
 #if VTK_VERSION_NUMBER >= VTK_VERSION_CHECK(9, 4, 20250513)

vtkext/private/module/vtkF3DUserRenderPass.cxx

@@ -12,6 +12,8 @@
 #include "vtkRenderer.h"
 #include "vtkShaderProgram.h"
 #include "vtkTextureObject.h"
+#include "vtkF3DRenderer.h"
+#include <vtkRendererCollection.h>
 
 vtkStandardNewMacro(vtkF3DUserRenderPass);
 
@@ -25,6 +27,7 @@ void vtkF3DUserRenderPass::Render(const vtkRenderState* s)
   vtkRenderer* r = s->GetRenderer();
   vtkOpenGLRenderWindow* renWin = static_cast<vtkOpenGLRenderWindow*>(r->GetRenderWindow());
   vtkOpenGLState* ostate = renWin->GetState();
+  vtkF3DRenderer* ren = vtkF3DRenderer::SafeDownCast(renWin->GetRenderers()->GetFirstRenderer());
 
   vtkOpenGLState::ScopedglEnableDisable bsaver(ostate, GL_BLEND);
   vtkOpenGLState::ScopedglEnableDisable dsaver(ostate, GL_DEPTH_TEST);
@@ -71,6 +74,7 @@ void vtkF3DUserRenderPass::Render(const vtkRenderState* s)
     vtkShaderProgram::Substitute(FSSource, "//VTK::FSQ::Decl",
       "uniform sampler2D source;\n"
       "uniform ivec2 resolution;\n"
+      "uniform float time;\n"
       "//VTK::FSQ::Decl");
 
     vtkShaderProgram::Substitute(FSSource, "//VTK::FSQ::Decl", this->UserShader);
@@ -96,6 +100,7 @@ void vtkF3DUserRenderPass::Render(const vtkRenderState* s)
   this->ColorTexture->Activate();
   this->QuadHelper->Program->SetUniformi("source", this->ColorTexture->GetTextureUnit());
   this->QuadHelper->Program->SetUniform2i("resolution", size);
+  this->QuadHelper->Program->SetUniformf("time", ren->GetTotalTime());
 
   ostate->vtkglDisable(GL_BLEND);
   ostate->vtkglDisable(GL_DEPTH_TEST);